Just updated from 10.8.1 to 10.8.2. Did it twice. First on a cloned HDD, just to try before proceeding on main SSD disk.
Second, on SSD.
Both times absolutely successful.
Updated according to advice, not through integrated Software Update, but from downloaded ComboUpdate.
Everything passed smoothly, no intervention ever required.
System looks stable so far. Though I had no time to test it yet.
MB Asus P7P55D
16 Gb RAM 1337 MHz DDR3
Video EVGA GeForce 9800 GT 1 Gb VRAM.
CPU 2.94 GHz Intel Core i7, i875k actually.
Yes, this is quite old hardware. Maybe this explains why everything went so smoothly...